The NOMA performance in the FBL regime was studied in [1]}, [2]}, [3]}, [4]}. In [1]}, optimal power and blocklength allocation was considered in a high signal-to-noise ratio (SNR) scenario, and the amount of NOMA transmission delay reduction was determined compared to OMA in a closed-form. In [2]}, transmission rate and power allocation of the NOMA scheme were optimized to maximize the effective throughput of the strong user, while the throughput of the other user was guaranteed at a certain level. The transmitter’s energy with a hybrid transmission scheme that combines the time division multiple access (TDMA) and NOMA was minimized in [3]} subject to heterogeneous latency constraints at receivers. In [4]}, an optimal power allocation algorithm was proposed to achieve max-min throughput under energy, reliability, and delay constraints in a DL-NOMA transmission and compared with its optimal OMA counterpart.
